20111211222 has 16 divisors (see below), whose sum is σ = 40242832560. Its totient is φ = 6700335392.

The previous prime is 20111211199. The next prime is 20111211313. The reversal of 20111211222 is 22211211102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837597 + ... + 861272.

It is an arithmetic number, because the mean of its divisors is an integer number (2515177035).

Almost surely, 2^20111211222 is an apocalyptic number.

20111211222 is an abundant number, since it is smaller than the sum of its proper divisors (20131621338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111211222 is a wasteful number, since it uses less digits than its factorization.

20111211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700847.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20111211222 its reverse (22211211102), we get a palindrome (42322422324).

The spelling of 20111211222 in words is "twenty billion, one hundred eleven million, two hundred eleven thousand, two hundred twenty-two".